Door-lock and alarm.



No. 685,877. Patented Nov. 5, IBM.

A. L. SHORE.

DOOR LOCK AND ALARM.

(Application filed M1125, 1901 I (No Model.)

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DOOR-LOCK ANDYALARM.

$PEGIF10AT1QN forming part of Letters Patent No. 685,877, dated November 5, 1901.

Application fi ed March 25, 1901.

To all whom it may concern:

Be it known that I, ANTHONY L. SHORE, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Door Locks and Alarms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. a

My present invention has for its object to provide an improved door-lock and alarm, and is in the nature of an improvement on the device set forth and claimedin my United States Letters Patent No. 667,799, of date February 12, 1901, entitled Portable doorlock and alarm.

The invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims, and the same is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a view, partly in plan and partly in horizontal section, showing my improved door-lock and alarm applied in working position to lock a door. Fig. 2 is a view in side elevation, showing the parts illustrated in Fig. 1, but with the door removed. Fig. 3 is a section on the line 40 00 of Fig. 2; and Fig. 4 is a view corresponding to Fig. 3, but showing a clamping-plate formed flat'instead of The numeral 1 indicates a door-frame, having a casing 2.

The numeral 3 indicates the door.

The door-frame 1, as is usual, is provided with a latch-plate 4, which, as shown, has a latch-receiving perforation 5 and a bolt-receiving perforation Gin line with the latter, of which the said frame is provided with a recess 7.

The character a indicates a flat stem or bar provided at its inner end with a laterallyprojecting lug or detent a, which when the inner end of said stem is placed between the door and the frame, the door being closed, as indicated in Fig. 1, projects through the lockbolt passage 6 and is held within the recess 7. The outer portion of the stein a is provided with screw-threads a, cut in the edges there- Serial No. 5 2,724. (No model.)

of. A large clamping-head afforded by a nut b, havinga knurled flange, is screwed onto the thread end of said stem (1.

The character f indicates a. coiled spring which surrounds the flattened stem at and is provided at its ends with springs, caps, or plugs f, which loosely fit upon the said stem a.

9 indicates an alarm-bell, which may be of any suitable construction. As shown, I employ one of the standard bicycle-bells, the alarm actuating mechanism of which is thrown into action by pressing inward a projecting stem g. This bell at its under side is provided with a slotted plate or pronged keeper which is adapted to straddle and closely fit the flattened stem a between the clamping head or nut b and the outer end of the spring f.

The construction so far described is identical with that set forth in my prior patent above identified. In that prior patent, however, the so-called an gle-plate or clamping-bracket was provided with a perforation through which the flattened stem a had to be passed endwise to apply the said angleplate or bracket in working position or to remove the same therefrom. This required, of course, that the nut or clamping-head b be first removed from the stem at. There are frequently times when it is important to be able to quickly remove the so-called angleplate from the stem, and, furthermore, this is always desirable in packing thedevice in small quarters.

In accordance with my invention I provide this angle-plate or clamping-bracket (indicated by the letter is in Figs. 1, 2, and 3) with one or more slots 70, which open at the edge or edges thereof. These slots 70' adapt the said plate to be placed in working position simply by moving it downward on the stem a, so that the downturnedslot or notch 70 straddles or embraces the said stem, as best shown in Fig. 3. As is evident, the angleplate may at any time be quickly lifted from its working position, thereby rendering the device inoperative and permitting the door to be opened.

With the slots or notches 7t located in the opposite edges of the plate 71) the plate may be readily reversed, so that its ofiset portion will project to the one sideor the other, as indicated by dotted lines in Fig. 3. It will of course be understood that it is necessary to throw the offset portion of the plate 70 to the one side or the other, according to the direction in which the door is mounted to swing. The clamping-plate (indicated in Fig. 4: and also designated by the character 70) is a simple fiat plate provided with the notches 70, same as in the previously-described construction.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. The combination with a fiat screw-threaded stem a provided at its inner end with means for securing it between a closed door and its frame, of a clamping-nut, bell and a spring on said stem, and a clamping plate or bracket 70 having a notch or open slot 70 adapted to be placed straddle of said flattened stem and ANTHONY L. SHORE.

WVitnessesz M. M. MCGRORY, F. D. MERCHANT. 

